Yes, I have the same issue, but it is due to Google Dance, a recent update. Till now detail article or blog release by experts. I am also looking why is being. One thing here I will add, please make sure about the theme or the website where you were submitted the links earlier and Google counted them as ""back link" for your website.

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Hello, don’t worry, it can be! Also, I want to recommend you to use Google AdSense! Is program in which enterprises can display Google advertisements on Web sites and earn revenue from hits that generate traffic for the Google search engines.